Tesla has continued to build up Navigate on Autopilot features in recent months. This includes automatic lane changing without the need for the driver to initiate with a turn signal. Under the right conditions, Autopilot can also now alert drivers if they are about to run a red light.
source: My Tesla Adventure
My AP 2.0 Tesla Model S just successfully navigated a left hand turn through an intersection while in autopilot.
The intersection is well marked, so this likely assisted Autopilot in its travels. There is certainly no guarantee that every Tesla on the road would successfully navigate similar intersections. So drivers should stay alert if attempting for themselves.